Carbureter.



J. A. MoHARDY & (LA. POTTER.

OARBURETEB.

APPLICATION FILED SEPT. 10 1908.

Patented Apr. 4, 1911.

2 SHEETS-SHEET 1.

8 INVENTORS. JHME3-H 41 64980)" WITNESSES W8 Parrse 8 ATTORNEY Cf/HBLESJ. A. MoHARDY & C. A. POTTER.

OARBURETER. APPLICATION FILED SEPT. 10, 1908.

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Owens 9. Porrse W By ATTORNEY Patented Apr. 4, 1911.

UNITED STATES RHODE ISLAND, A CORPORATION OF MAINE.

Specification of Letters Patent. Application filed September 10, 190a.

Patented Apr. 4, 1911. Serial No. 452,508.

To all whom it may concern: I

Be it known that we, JAMES A. MCHARDY and CHARLES A. Forum, citizens ofthe United States, residingat the city of Pr0vidence, in the county ofProvidence and State of Rhode Island, have invented certain new anduseful Improvements in Carbureters, of which the following is aspecification, reference being had therein to the accompanying drawing.

This invention relates to carbureters of the class employed forvaporizing hydrocarbon oil "as it is fed to an internal conibustionengine, and the object of the invention is 'to control the flow of themixture through the carbureter and automatically increase or decreasethe proportion of air at a predetermined ratio operation of a singlevalve.

It is an understood fact in the operation of motor car engines, that asthe speed increases the percentage of gas required to economicallyoperate the same decreases and the percentage of air increases in agiven ratio, the reverse taking place as the speed is reduced, theslower the engine runs the richer the mixture required.

In carrying out our invention with the above in view, we have arrangedan auxiliary air inlet and a vapor inlet side by side so that they maybe controlled by one valve. The port in the vapor inlet is madesubstantially in a tapering form and arranged to exactly pro ortion thevapor to the amount ofair admitted through the auxiliary air port, sothat a proper and most economical mixture will be had at all times andat all speeds of the engine. An auxiliary a erture is also formedthrough the valve nto the vapor port so that when the valve is nearlyclosed the engine will receive a mixture of suflicient richness toenable the same to run very slow. The size of this port may becontrolled by an adjusting screw to suit different enginesand to 'rununder the varyunder which the on to operate.

It is ound in practice that when a car is running alongon a slight angleor when going up or down hill, or when thrown from side to side intraveling rapidly over a rough road, that the float in the carbureteroften times becomes stuck and will not operate mg conditions same maybecalled u properly. obviate this difliculty we have to the gas by theprovided a long pivoting spindle of considerable length WlllCll has itshearings in adjustable screws located one in either side of the floatchamber, by which construction it is impossible for the float under themost trying conditions to get out of alinement or come jammed in itsbearings.

In order to facilitate the starting of the engine a circular feed wellis formed around the mouth or lower portion of the draft flue so thatwhen the float chamber is flooded by raising the inlet valve thegasolenewill flow out of the supply nozzle, run down the side walls and fill upthis circular well, whereby all of the air as it enters both ports inbeing drawn in to start the engine comes in contact with and becomeshighly charged with the gasolene from the well, thus senting a richmixture to the cylinders enabling the same to start with great ease.After the engine is started the gasolene is sprayed into the enteringair from the supply nozzle as it is being drawn into the cylinders.

lVith these and other objects in view, the invention consists of certainnovel features of construction, as will be more fully described andparticularly pointed out in the appended claims.

In the accompanying drawings: Figure 1 is a central sectional sideelevation of our improved carbureter. Fig. 2- is a top view of the floatchamber with the top cap removed. Fig. 3 is a plan of the valve seatwith the valve and retaining plate'removed. Fig. 4- is a plan view ofthe valve seat with the valve in position thereon. Fig. 5- is a plan ofthe sliding valve. Fig. 6- is a detail showing the float hinge and yokefor engaging 7- is a detail showing a portion of the float and itsconnection to. the valve s indle. Fig. 8 is an end view of the sli ingvalve. Fig. 9- is a detail of a tubular ringshaped wire coil.

' Referring to the drawin s shaped float chamber, an

at 1 is a bowl 2 desi na-tes a pipe or tubular portion exten ing 11through its center to form a draft flue. This flue is divided by meansof the partition 8, one side 4 being entirely free for the admission ofair, while in the op osite side supply nozzle 5, w ich is at tached tothe wall of the tubular portion prethe inlet valve splndle. Fig.

23 of the valve spindle may be raised by the j v .esaeoo The lower endof this nozzle communicates semi-circular form, whilethe vapor side 33throu ii the passa' e 6 into the float chamis partially closed by saidtapering bridge ber, t e upperen being provided with a whereby theproportion of vapor admitted reduced outlet 7 into which a regulatingthrough this port grows gradually less as 5 needle 8 is adapted to fit,so as'to contro compared with the air. By this arrange- 7c the supplytherefrom. The inlet'passage 9 mentthe mixture is positively controlledto the float chamber is controlled by a valve and regulated so that thefaster the engine 12 carried by a spindle 10, the lower end of runs thegreater the proportion of air to a which is reduced at 11 to enter-saidinlet that of thegasolene, the percentage being in 1 and form' a guide,the upper portion of a fixed ratio.

this spindle beingsupported in the guide In order that the engine mayhave mixboss 25. This spindle valve is actuated by means of a float13,which may be constructs ed of cork, orany other suitable mate 1 rial,said float, being pivoted at 14 on the hinge rod 15, which rod'receivesits bearings in the recesses 164-16 in the ends of the screws 17-17.These screws arethreaded through-bosses 18 in the sides of the floatchamber and may be adjusted and set in the proper position and alsoregulated to take up the wear of the hinge rod so as to always insure aperfect working of the float. Another feature of this construction isthat the hinge is so ver lon extending from side to side of the oat camber, that it is impossible for the same to get out of order, or becomejammed, or bound, so that the float will not work properly even when thecar is tipped up at an acute angle when going along the side of a hill,or up and down'steep inclines, or from any shock or jar which might becaused by rapidly running the car over rough roads.

A double armed yoke 19 constructed of thin material having forked ends20 extends out laterally from the float to engage both the upper andlower faces of the collar 21 on the spindle 10, so that when thegasolene is at the required height in the float chamber the float willrise and close the valve 12 and prevent the gasolene from furtherentering the chamber only as fast as the same is drawn therefrom. Asmall bolt 22 is passed through hese arms and is adapted to be set up tobring the arms toethervand take up the wear on-the faces which workagainst said collar. p

In priming the carbureter the upper end run at a veryslow speed, a hole35 has been provided through the valve which is adapted to communicatethrough into the vapor ort when the valve is nearly" closed. The" end ofan adjustable screw 36 is adapted to enter said hole from the end of thevalve and regulate its size so. that the carbureter ply exactly thenecessary quantity of vapor to control the speed of the same.

The needle valve 8 is threaded at 38 and provided with a head 37 so thatits point 39 may be adjusted to nicely regulate the flow ofhydrocarbonthrough the supply nozzle 7 A top plate 40 having a central outlet pipe41. is designed to cover the valve and valve channel and is threaded onits outer end onto which the engine supply pipe is connected.

One of thegreat draw-backs in the use of gasolene engines is the factthat oftentimes considerable difliculty is experienced in trying tocrank or start the same, which dii'fi- 1 'culty is largely due to thfact that the cylin- -ders do not receive a mixture rich enough toignite readily. To obviate this difficulty and provide a mixture ofsuflicient richness for this purpose a circular well collar 42 is 1attached, by soldering, screws or other suit able means, to the lowerend of the float chamber 1 and arranged to surround the central draftflue 2 through said chamber, leaving a narrow aperture 43 through which1 the asolene is drawn from the circular cham er 44 within the collar bythe suction of all of the entering air, there y providing a mixture ofsuflicient richness to enable the It is found in practice that the airdrawing rapidly up through the flue 4 over the slotted portion 43 causesa whistling sound which is objectionable, and in order to obviate thisnoise a wire 45 wound helically in 1 a tubular form and bent in acircle,-in the manner illustrated in Fig. 9, is inserted into thecircular. chamber 44, thus breaking up the rapid circulation of the aircurrents throng said chamber and efiectually stops the noise.

thumb and finger, the stop 24 serving to prevent an excess upward motionof t e same. A cover plate or head 26 is'secured to the upper portion ofthe float chamber 55 by means of the screws 27 and in this plate isformed a channel or valve seat 28 in which the throttle valve 29 isadapted to be moved back and forth through the outwardly extending pin30. The limit screws 60 30" and 31 control the stroke of the-valve inbothdirections. essential feature of v v thisyalve seat is that the porttherethrough The operation of our improved carbureter is divided by a.substantially wedge-shaped. may be more fully descr'bed as follows: Inbr dge 31, the air inlet side 32 of said port starting the engine thefloat chamber to the 65 being unobstructed and substantially in acarbureter is flooded by raising the end of ture of suflicient richnessto enable it to may be adjusted to different engines to sup- 85 I enginetobe started without difliculty. 115 j ass,soo

the valve spindle 23, allowing the gasolene to run out of the jet nozzle7 and down the side walls of the tub around the metal and finally fillsthe circular well 44 around the lower end of the air flue. As the engineis then turned over all of the'air drawn in is highly charged with thegasolene'vapor presenting a rich explosive mixture to the cylinders,enabling the engine to be started with greatest ease.

' Both the air and the gas ports are arranged side by side andcontrolled by the action of a single valve, the shape of the vapor portin said valve being carefully figured out and fixed so that both the airand the vapor openings are at all times in exactly the proper ratio oneto the other, insuring the proper mixture in the cylinders at all speedsfrom the highest to the lowest.

It is obvious, that the vapor for the mixture is obtained by thecurrents of air passing around the nozzle 5 as the latter discharges thehydrocarbon.

By the use of this device an engine is adapted to run at any speed fromthe very lowest to the very highest with the greatest possible economy.

he device is very simple and practical in construction and extremelyetlicient in its operation and by its use the efficiency of thehydrocarbon engine is greatly increased.

Having thus described our invention, what we claim as new and desire tosecure by Letters Patent, is:

1. A carbureter comprising a hydrocarbon reservoir, a flue extendedtherethrough, a partition extending longitudinally through said flue toform an air passage and a carbureted air passage, means for supplyinghydrocarbon vapor to the latter passage, and a single valve controllingboth passages simultaneously, said partition being pro vided with meanscooperating with said valve for permitting the flow of air and vaportovary in a predetermined ratio, said valve having a port communicatingw1th the carbureted air passage when nearly closed.

2.'A carbureter comprising a hydrocaron reservoir, a flue extendedtherethrough, a partition extended longitudinally through said flue toform an air passage and a carbureted air passage, means for supplyinghydrocarbon vapor to the latter passage, and a single valve controllingboth passages simultaneously, said partition being provided with meanscooperating with said valve for permitting the flow of air and vapor tovary in a predetermined ratio, said valve belng provided with anauxiliary port arranged to communicate with the carbureted air passagewhen the valve is nearly closed.

3. A carbureter comprisinga flue, a partition extended longitudinallytherethrough to form air and carbureted air passages, a

e where it follows feed nozzle located in the carbureted air passage,means for regulating the flow through said nozzle to produce the maximumengine speed, a slide valve operating across said flue and provided withports controllin said air and hydrocarbon passages, 81K adjustable meansfor regulatin the flow of b an air passage and a carpassage, means forsupplying hydrocarbon vapor to the latter passage, and a single valvecontrolling both passages simultaneously, said partition being providedwith means cooperating with said valve for permitting the flow of airand vapor to vary in a predetermined ratio, said valve being alsoprovided with an auxiliary port arranged to communicate with thecarbureted air supply, and means for regulating the size of saidauxiliary port.

carbureter comprising a hydrocarbon reservoir, a flue extendedtherethrough, a partition extending longitudinally through said flue toform an air passage and a carbureted air passage, provlded with adjacentoutlets separated by a tapered bridge, means for supplying hydrocarbonvapor to the carbureted air passage, and a valve provided with a singleport for simultaneously controlling both of said outlets, whereby theflow of air and hydrocarbon is varied in a predetermined ratio.

7. A carbureter comprising a hydrocarbon reservoir, a fine extendedtherethrough, a partition extending longitudinally through said flue toform an air passage and a carbureted air passage provided with adjacentoutlets separated by a tapered bridge, means gle port arranged forsupplying hydrocarbon vapor to the carbureted air passage, and a valveprovided with a single port for simultaneously controlling both of saidoutlets, said valve being also provided with an auxiliary port arrangedto communicate with the carbureted air supply.

8. A carbureter provided with a draft flue, a fuel receiving wellprovided with a chamber encircling said flue whereby the engine,

breaking up lthrough the same being ma entering air vaporized fuel tofacilitate star-ting the and means in said chamber for the, air currentscirculating, to prevent a noise from de by the ai entrance to said Well.a p

9. A carbureter provided with a draft flue, a fuel receiving wellprovided with a chamber encircling said flue whereby all of the enteringair may be highly charged with vaporized fuel to facilitate starting theenmay be highly charged with! gine, and

r'passing rapidly by the 7

